<?php declare(strict_types=1);

namespace AeonDumpManager\Service;

use AeonDumpManager\Service\Exception\DumpBinaryNotFoundException;
use Doctrine\DBAL\Connection;
use Shopware\Core\System\SystemConfig\SystemConfigService;
use Symfony\Component\Process\ExecutableFinder;

/**
 * Picks mariadb-dump/mysqldump depending on what the configured DB connection
 * actually is, mirroring Doctrine DBAL's own stripos($version, 'mariadb')
 * version-string check (no shared platform base class to rely on instead).
 */
class DumpBinaryLocator
{
    public function __construct(
        private readonly Connection $connection,
        private readonly SystemConfigService $systemConfigService,
        private readonly ExecutableFinder $executableFinder,
    ) {
    }

    public function locate(): string
    {
        $configuredName = $this->systemConfigService->getString('AeonDumpManager.config.dumpBinaryName');
        $binaryNames = $configuredName !== ''
            ? [$configuredName]
            : ($this->isMariaDb() ? ['mariadb-dump', 'mysqldump'] : ['mysqldump']);

        foreach ($binaryNames as $binaryName) {
            $path = $this->executableFinder->find($binaryName);
            if ($path !== null) {
                return $path;
            }
        }

        throw DumpBinaryNotFoundException::create($binaryNames);
    }

    private function isMariaDb(): bool
    {
        // Connection::getServerVersion() is private in the DBAL version this
        // repo pins against — SELECT VERSION() is the stable public way to get
        // the same string.
        return MySqlVariant::isMariaDb((string) $this->connection->fetchOne('SELECT VERSION()'));
    }
}